Portable boiler



(No Model.)

2 sneetssheet W. BERRENBERG.

PORTABLE BOILBRI N0. 360,847. Patented Apr. 12, 1887.

" 8 Mgg/MM? i NA PETERS, PhaIn-Liwnpnn Wilhirlglull D. C.'

UNITED rares VILLTAM BERRENBERG, OF BOSTON, MASSACHUSETTS.

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PORTABLE Bouten.

SPECIFICATION foaming part of Letters Patent No. 860,847, dated April 12, 1887.

Application filed March 2l, 1886. Seri-.1l No. 196,317.

of Boston, in the countyof Suffolk, State of Massachusetts, have invented certain new and useful Improvements in Boilers for Portable Steam-Engines, of which the following is a specification.

The removing of scales from the iiues of the boilers of portable engines is connected with some difficulty," and numerous attempts 'have been made to construct the boilers of portable engines in such a manner that the scales can be readily removed from the lines; but in all such cases' the size of the nre-box was reduced and the products of combustion passed but once through the boiler.

The object of my invention iste provide a new and improved boiler for portable engines, which is so constructed that the tire-box can be removed with some of the tubes for the purpose of cleaning them.

A further object is to provide means for utilizing the exhaust-steam for the purpose of heating the feed-water.

The invention consists in a boilerhaving a series of upper tlues or tubes secured te the heads ofthe boiler and the lower tubes secured' to the inner wall of a removable iire-boX, and to a plate which is bolted to the front head of the boiler.

rlhe invention also consists in the combina tion, with the smoke-stack, of a water-jacket surrounding the same, a steam-jacket surrounding the water-jacket, and diametrical Water-pi pes passing through the smoke-stack, all as will be fully described and set forth hereinafter, and pointed out in the claims.

In the accompanying drawings, Figure 1 is an end view of my improved boiler for porta-v (No model.)

ends secured in the inner wall, E', ofthe removable fire-box E, and in the plate F, which is attached by bolts G on the inner surface of the front head, D. The iire-box E is located within the enlarged box H, formed on the rear end of the boiler in the usual manner, said fire-box E projecting beyond the outer surface of the rear head, C, and'being supported by an angle-iron, J, which is attached by bolts J to the head C, as shown in Fig. l. A grate, l, is provided in the movable rebox E. At the opposite or front end of the boiler is arranged a smoke-box, K, in which the damper-valve L is located. The smoke passes from the fire-box, through the lower set of tubes, A', into the smoke-box K, and then either directly to the smokestack M or through a portion of the upper tubes, A, to the rear part of the boiler, and another portion of the tubes A to the smokestack, according to the position of the damper-valve L. The smokestack M projects upward from the smoke-box, and is surrounded by a water-jacket, N, which in turn is surrounded by a steam-jacket, O, into which the exhaust-steam from the engine (which is supported on the boiler, but not shown in the drawings) is conducted by the pipe O, the steam being then conducted from the jacket O, by the pipe O2, into the smokestack M. Diametrical pipes P, located at right angles to each other, extend through the smoke-stack and connect the opposite sides of the water-jacket at different elevations.

The feed-water is fed by means of a suitable pump or injector, WV, through the pipe WV', into the water-jacket N, and from the same into the boiler. The water is heated while in the water-jacket by the cxhauststeam in the jacket O and the smoke and het products of combustion acting on the inner surface of the water-jacket N and the pipes P. When the boiler is to be cleaned, the bolts J and G are detached, and then the removable fire-box E and the tubes A', connected with the same, withdrawn in longitudidal direction from the boiler-shell, thus facilitating the cleaning of the tubes A and of the tubes A, supported by the heads of the boiler-shell. rlhe removable tire-box E and the tubes A are replaced easily and quickly after cleaning by rcattaching the tire-box E and plate F to the boilershell.

ICO

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A steam-boiler having some of its tubes fixed permanently in the heads of the boilershell and the remaining tubes fixed in the inner wall of aremovable fire-box, and in aplatc which is bolted to the front head of a boiler, substantially as herein shown and described.

2. In a steanrboiler, the combination, with a shell and tubes fixed in the same, of a rcmovable irebox provided at its outer cud with an angle-iron which is bolted to the rear head of the boiler, and of tubes having their ends secured to the inner Wall of said removable fire-box, and in a plate which is bolted to the front head of the boiler, substantially as shown and described.

il. In a steam-boiler, the combination, with a shell and tubes fixed in the upper part of the same, of a removable fire-box, one end ot' which projects beyond the rear head of the boiler, an angle-iron extending around the projecting end of the [ire-box, bolts-for attaching said angle-iron to the rear head, and tubes attached to the inner Wall of the removable lirebox, and to a plate bolted to the front head of the boiler-shell, substantially as shown and described.

4. The combination, with a portable steamboiler and its smokestack, of a Waterjacket surroundi n g the smokestack and having transverse connecting-pipes which pass through the smoke-stack, and ol' a steam-jacket surrounding the Water-jacket and provided With inlet and outlet pipes for the exhaust-steam, substantially as shown and described.

In testimony that I claim the foregoingr as my invention I have signed my namein presence of two subscribing witnesses.

VILLIAM BERRENBERG.

Wit nesses:

PAUL Gonrm., SIDNEY llLifvN. 

